Rosette.



Patented A r,- 22, I992;

W. T. THOMAS.

Rosana, (Application filed Dec. 26, 1901 (No Model.)

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. FIG-31 INVENTOR:

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UNITED STATES PATENT OFF CE.

WILLIAM T. THOMAS, OF PHILADELPHIA, PENNSYLVANIA.

ROSlETTE.

SPEGELFICATIONfbr-ming part Of Letters Patent N0. 698,233, dated April 22, 1902 Application filed December 26, 19 01. Serial No. 87,275. (No model.)

To all whom it may concern.-

Be it known that 1, WILLIAM T. THOMAS, a citizen of the United States, residing in the city of Philadelphia, in the county of Phila-v delphia and State of Pennsylvania, have'in vented certain new and usefullmprovements in Rosettes, of which the following is a specification.

My invention relates to the class of devices known as rosettes, which as is well known, in addition to constituting junction boxes, so to speak, in which are effected the necessary connections between the line or circuit wires, and branch wires in circuit with drop'electric lights or other devices, incidentally serve to support in the circuits of said branch wires, fuses which protect said branch circuits from excess of current.

In the use of what is now well known as the three wire system, in which three line wires, which maybe designated as to, y, 2, respectively, are employed, the wires ofcertain of the pairs of branch wires are, in making the connection with said line wires, placed in circuit with wires'oc and g, respectively, while the wires of certain others of the pairs of branch wires'are placed in circuit with'wires y and 2 respectively.

It is the object of my invention to provide a rosette of such construction that the three line wires may be snugly-and neatly boxed or inclosed in it,and also that connection between a pair of branch wires and either the wires 00 and 'y or y and 2 respectively, of the 5 r i and screw it, of adequate size, the groove 0 line wires, may be effected at will.

In the accompanying drawings,

Figure l is a view in edge elevationbf a re} I sette embodying my invention.

Figure 2 is a plan of the same.

Figure 3 is a plan of the base block.

Figure 4 is a sectional elevation on 4-4 of Figure 2.

Similar letters of reference indicate corresponding parts.

In the drawings,

a, is the base block having the three grooves 01' open channels Z), c, d,'extending in parallelism through its top face, and the openings 6, through which screws may be inserted for the attachment of the block to a molding or wall.

fis a cond ucting plate, one portion of which theline in the form illustrated rests in a suitable recess or seat'in the face of the block abetween the groove d and the adjacent edge of the block, being secured in position by a screw g,-and the other portion of which extends down into and across the bottoniof said groove d, as shown especially in Figures 3 and 4. p t

h is a binding screw entered through that portionof the platef which lies in the groove d, and i is a screw entered in that portion of said plate exterior to said groove.

' That portion of the plate]' which is in the grooved, in conjunction with the screw h,

constitutes what may be termed a contact device for making electrical connection with a.

wire passing through said groove.

3 is a conducting plate resting in a suitable recess or seat in the face of the block, between the groove 1) and the adjacent edge of the block. I

k is a conducting plate resting in a suitable recess Zin the rear face of the block, and extending from a point opposite the plate j,

as far as the region opposite or beneath'the may be, as shown, slightly widened atits central portion.

Theplate m in conjunction with the screw n constitutes what may be termed a contact device for making electrical connection with a wire passing through the groove 0.

The screws electrically connect the plate 70 with the plates j and m respectively. 19 is a screw entered in the platej.

In connection with a base plate bf the described construction, a cap plate of any usual form may be employed.

The cap plate q shown in the drawings is, with the parts it carries, of well known form.

ICO

Said cap plate is provided with the two counterpart contact plates 0', having projecting ends adapted to engage with the screws c', p,

to detachably secure the cap to the base plate and establish electrical connection between said plates 1' and the plates fj.

Said cap plate is (as shown in dotted lines in Figure 2) also provided with the two usual terminals 3 with which the branch wires tare respectively connected, and with fuses to extending from the respective terminals 5- to the respective plates r to which said fuses are connected by means of the binding screws 0). The plates 0' are secured to the cap by screws or rivets 'w.

The operation of my improved rosette will be readily understood:

\Vhen the base blockais mounted in suitable relation with respect to a wall or molding, the three line wires 33, l .2, extending respectively through the respective grooves b, c, 6?. Of said line wires, 00 and e are, respectively, the ordinary positive and negative wires, and the wire y is what may be termed the third or neutral wire.

In making connection between the branch wires t of drop lights or kindred devices, and said line wires, it may be desired to connect certain of the pairs of branch wires with the line wires y, z, and certain other of the branch wires with the line wires :r, y.

l Vhen the parts and wires are in the posi-- tion illustrated in the drawings, theline wire extending through the groove (1 will, through the plate f, screw 1', plate 7', fuse, and plate .9, be in electrical connection with one of the branch wires 25, and the line wire extending through the groove or channel 0 will, through the plates 172, 7r, j, screws or rivets 0, screwp, plate '1", fuse a, and plates, be in circuit with the other of the said two branch wires. The branch wirest are thusin circuit with the line wires 3 :5. The line wire extending through the channel I) will not be in circuit with either of the branch wires, but will simply extend idly, so to speak, through the rosette.

\Vhen it is desired to establish the connection between the branch wires t and the line wires :2: 1 the position of the base block may be reversed, with the result that the channel (1 (instead of the channel 1)) will receive the wire :0, the channel 1) (instead of the channel (2) will receive the wire a; the channel 0 will, of course, in either arrangement still receive the wire In this reversed position, the wire it makes electrical connection with the plate fand the wire y makes electrical connection with the plates m kj and the result, of course, is that said wires cc, y, are placed in circuit with the branch wires, and the wire 2 extends unconnected through the channel Z).

Manifestly my invention provides a very simple, easily manufactured, and economical arrangement, by which pairs of branch wires may be connected to selected pairs of a group of three line wires, such means involving the minimum of departure in mechanical construction from the forms of rosettes well known in the art.

My improved rosette is of neat finish and appearance, and operates to retain the line wires boxed and secured in the respective channels, thus obviating the necessity for one of said wires to extend outside.

Having thus described my invention, I claim-- 1. In a rosette, in combination, a cap having an aperture for branch wires for drop lights or the like, terminals carried on said cap, with which said branch wires are respectively in circuit, a base block having terminals adapted to make contact with the terminals of the cap plate, three grooves or channels formed in said base block and adapted to receive line wires, two of said grooves having contact devices adapted to make electrical connection with wires passing through said grooves, said contact devices being in circuit with the respective terminals of the base block.

2. In a rosette, in combination, a cap having an aperture for branch wires for drop lights or the like, terminals carried on said cap, with which said branch wires are respectively in circuit, a base block having terminals adapted to make contact with the terminals of the cap plate, three grooves formed in said base block and adapted to receive three line wires the central and one of the side grooves having each a contact device adapted to make electrical connection with a Wire passing through the groove in which said contact device is situated, said contact devices being in circuit with the respective terminals of the base block.

3. In a rosette, in combination, a cap having an aperture for branch wires for a drop light or the like, terminals carried on said cap with which said branch wires are respec tively in circuit, a base block having terminals situated respectively on its opposite edge portions and adapted to make electrical connection with the terminals of the cap plate, three grooves or channels formed in said base block and adapted to receive three line wires, a contact device arranged in one of the side grooves and in circuit with one of the terminals of the base block, a second contact device located in the central groove, a conducting plate mounted on the rear portion of the block, and conducting connections uniting the contact device in the central groove, and the second of the terminals of the base plate, with said conducting plate, substantially as set forth.

In testimony that I claim the foregoing as my invention I have hereunto signed my name this 19th day of December, A. D. 1901.

\VILLIAM T. THOMAS.

In presence of- S. SALoMn BROOKE, THos. K. LANCASTER. 

